Question

Which strategy has been used to add \(7\) and \(4\) ?

Answer 1

Say: Let's read the question and observe the image.

Ask:
\(\bullet\) What do we have to do here?
Ans: We need to identify the strategy used to solve the equation.
\(\bullet\) By looking at the given image, what can you understand?
Ans: \(7\) and \(4\) are to be added, i.e., \(7 + 4.\)
How have we done this?
Ans: (i) We can see that number \(4\) is broken down into \(3\) and \(1\).
(ii) \(7\) and \(3\) are added to give us \(10.\)
(iii) Finally, \(10\) and the remaining \(1\) are added, i.e., \(10 + 1,\) to get the total of \(11\).
\(\bullet\) So, based on the given options, what strategy has been used to solve the equation?
Ans: Make a \(10\)

Hence, Option A is correct.

WB: Use the whiteboard to write the equation and find the total using the make a ten strategy as shown and explain the steps.


Probing Qustion:
How can we be certain that the “make a ten” strategy has been used?
A. We can see that \(4\) is broken down into \(3\) and \(1\), so that 3 can be added to 7, because \(7 + 3 = 10.\)